From: Al Viro <viro@ZenIV.linux.org.uk>
To: Dave Jones <davej@redhat.com>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: VFS deadlock ?
Date: Thu, 21 Mar 2013 19:21:46 +0000 [thread overview]
Message-ID: <20130321192146.GX21522@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20130321190653.GA15479@redhat.com>
On Thu, Mar 21, 2013 at 03:06:53PM -0400, Dave Jones wrote:
> Al, Linus,
> trinity-child2 D ffff880110b3a7e0 5448 7669 1 0x00000004
[sits in rename(), trying to grab ->i_mutex on a parent]
> Showing all locks held in the system:
> 4 locks on stack by trinity-child2/7669:
> #0: blocked: (sb_writers#4){.+.+.+}, instance: ffff8801292d17d8, at: [<ffffffff811df134>] mnt_want_write+0x24/0x50
> #1: held: (&type->s_vfs_rename_key){+.+.+.}, instance: ffff8801292d1928, at: [<ffffffff811c6f5e>] lock_rename+0x3e/0x120
> #2: held: (&type->i_mutex_dir_key#2/1){+.+.+.}, instance: ffff880110b3a858, at: [<ffffffff811c701e>] lock_rename+0xfe/0x120
> #3: blocked: (&type->i_mutex_dir_key#2/2){+.+.+.}, instance: ffff880110b3a858, at: [<ffffffff811c7034>] lock_rename+0x114/0x120
Wait a minute... How the hell does it manage to sit with *two* blocked locks?
Confused...
next prev parent reply other threads:[~2013-03-21 19:21 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-21 19:06 VFS deadlock ? Dave Jones
2013-03-21 19:21 ` Al Viro [this message]
2013-03-21 20:31 ` Dave Jones
2013-03-21 19:29 ` Al Viro
2013-03-21 20:15 ` Linus Torvalds
2013-03-21 20:26 ` Dave Jones
2013-03-21 20:32 ` Linus Torvalds
2013-03-21 20:36 ` Dave Jones
2013-03-21 20:47 ` Al Viro
2013-03-21 21:02 ` Dave Jones
2013-03-21 21:18 ` Linus Torvalds
2013-03-21 21:26 ` Al Viro
2013-03-21 21:41 ` Dave Jones
2013-03-21 21:47 ` Linus Torvalds
2013-03-21 21:55 ` Al Viro
2013-03-21 21:57 ` Linus Torvalds
2013-03-21 22:03 ` Al Viro
2013-03-21 21:52 ` Al Viro
2013-03-21 22:12 ` Dave Jones
2013-03-21 22:29 ` Dave Jones
2013-03-21 22:53 ` Linus Torvalds
2013-03-21 23:07 ` Dave Jones
2013-03-21 23:36 ` Al Viro
2013-03-21 23:58 ` Linus Torvalds
2013-03-22 0:01 ` Linus Torvalds
2013-03-22 0:12 ` Al Viro
2013-03-22 0:20 ` Al Viro
2013-03-22 0:22 ` Linus Torvalds
2013-03-22 1:22 ` Al Viro
2013-03-22 1:33 ` Linus Torvalds
2013-03-22 1:40 ` Al Viro
2013-03-22 4:37 ` [CFT] " Al Viro
2013-03-22 4:55 ` Linus Torvalds
2013-03-22 5:18 ` Al Viro
2013-03-22 5:33 ` Linus Torvalds
2013-03-22 6:09 ` Al Viro
2013-03-22 6:22 ` Al Viro
2013-03-22 16:23 ` Dave Jones
2013-03-22 19:43 ` Linus Torvalds
2013-03-22 21:28 ` Al Viro
2013-03-22 22:57 ` Eric W. Biederman
2013-03-22 5:19 ` Linus Torvalds
2013-03-22 0:08 ` Al Viro
2013-03-22 0:15 ` Linus Torvalds
2013-03-22 0:19 ` Linus Torvalds
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